A.\(\frac{{2x}}{{{x^2} + 2}}\)
B.\(\frac{1}{{{x^2} + 2}}\)
C.\(\frac{x}{{{x^2} + 2}}\)
D.\(2x\left( {{x^2} + 2} \right)\)

A.\(x = \frac{5}{2}\)
B.\(x = 3\)
C.\(x = 2\)
D.\(x = \frac{3}{2}\)

A.\(\int {f\left( x \right)dx}  = {x^3} - {x^2} + x + C\)
B.\(\int {f\left( x \right)dx}  = 3{x^3} - 2{x^2} + x + C\)
C.\(\int {f\left( x \right)dx}  = 6{x^3} - 4{x^2} + 2x + C\)
D.\(\int {f\left( x \right)dx}  = \frac{{{x^3}}}{3} - \frac{{{x^2}}}{2} + x + C\)

A.\(\left( { - \infty ;0} \right)\)
B.\(\left( {0;1} \right)\)
C.\(\left( {1; + \infty } \right)\)
D.\(\left( { - 1;0} \right)\)

A.\(2\)
B.\(4\)
C.\(1\)
D.\(3\)

A.\(V = \frac{1}{3}Bh\)
B.\(V = \frac{1}{2}Bh\)
C.\(V = 3Bh\)
D.\(V = Bh\)

A.\(25\)
B.\(49\)
C.\(42\)
D.\(13\)

A.\(2\)
B.\( - 4\)
C.\( - 2\)
D.\( - 2i\)

A.\(2\)
B.\(4\)
C.\(1\)
D.\(3\)

A.\(8\)
B.\(7\)
C.\(4\)
D.\(6\)